Adds preload and effective rate to rear torsion springs.
Allows for more accurate ride height setup.
Increases efficiency of rear torsion springs.
Fits all compatible with Ski-Doo SC4 Models

This item fits the following vehicle applications:
compatible with Ski-Doo Freestyle 300F 2006
compatible with Ski-Doo Freestyle Park 550F 2007-2008
compatible with Ski-Doo Freestyle Session 300F 2007-2008
compatible with Ski-Doo Freestyle Session 550F 2007
compatible with Ski-Doo GSX 380 Fan 2006
compatible with Ski-Doo GSX 500SS Sport 2006-2007
compatible with Ski-Doo GSX 550 Fan 2006-2009
compatible with Ski-Doo GSX 600 Limited 2006-2007
compatible with Ski-Doo GSX 600 Sport 2006-2007
compatible with Ski-Doo GSX 800 Limited 2006-2007
compatible with Ski-Doo GTX 500SS Sport 2006-2008
compatible with Ski-Doo GTX 600 Limited 2006-2008
compatible with Ski-Doo GTX 600 Sport 2006-2008
compatible with Ski-Doo GTX 800 Limited 2006-2007
compatible with Ski-Doo Legend Trail V-800 2008
compatible with Ski-Doo Mach Z 1000 2005
compatible with Ski-Doo Mach Z Adrenaline 2006-2007
compatible with Ski-Doo Mach Z X 2006-2007
compatible with Ski-Doo MX Z 1000 Renegade 2007
compatible with Ski-Doo MX Z 1000 Renegade X 2006-2007
compatible with Ski-Doo MX Z 380 Fan 2006
compatible with Ski-Doo MX Z 500 Adrenaline 2006-2007
compatible with Ski-Doo MX Z 500 Trail 2006-2007
compatible with Ski-Doo MX Z 550 Fan 2006-2008
compatible with Ski-Doo MX Z 550 X 2006-2009
compatible with Ski-Doo MX Z 600 Adrenaline 2006-2007
compatible with Ski-Doo MX Z 600 Blizzard 2007
compatible with Ski-Doo MX Z 600 Renegade 2006-2007
compatible with Ski-Doo MX Z 600 Renegade X 2006-2007
compatible with Ski-Doo MX Z 600 X 2005-2007
compatible with Ski-Doo MX Z 600 X-RS 2007
compatible with Ski-Doo MX Z 800 Adrenaline 2006-2007
compatible with Ski-Doo MX Z 800 Blizzard 2007
compatible with Ski-Doo MX